MBS 155/2A USB is a 250 W amplified loudspeaker made of ABS plastic. It is comprised of a 15" woofer and a 1.75" compression driver. It has an FM radio player and an MP3 player through USB, SD or Bluetooth devices. Includes insert for 35 mm support, lateral transport handle. In addition, it incorporates microphone input with XLR3 and 1/4" Jack connectors, and line input with RCA and XLR3 connectors, both with volume control, and outputs with XLR3 and 1/4" Jack. It also has control of tones (bass and treble) and master volume.